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Finding the Fourth Proportional to 8,998.65, 12,417.78 and 5,221.62

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Solution

The fourth proportional to 8,998.65, 12,417.78 and 5,221.62 is: 7,205.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,998.65 : 12,417.78 = 5,221.62 : x
  2. Step 2: Convert to fraction form
    8,998.65/12,417.78 = 5,221.62/x
  3. Step 3: Cross multiply
    8,998.65x = 12,417.78 × 5,221.62
  4. Step 4: Simplify right side
    8,998.65x = 64,840,928.40
  5. Step 5: Solve for x
    x = 64,840,928.40/8,998.65
  6. Step 6: Final answer
    x = 7,205.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.